Micro/nanoparticle adjuvants: preparation and formulation with antigens

Area of Science:

• Biotechnology
• Vaccine Development
• Materials Science

Background:

• Recombinant proteins are promising vaccine antigens but often poorly immunogenic.
• Effective vaccine strategies require delivery systems and adjuvants to enhance antigen potency.
• Biodegradable polyesters like polylactide-co-glycolides (PLG) are suitable for these roles.

Purpose of the Study:

• To discuss the application of PLG micro/nanoparticles as antigen delivery systems and adjuvants.
• To detail the synthesis and characterization methods for PLG-based vaccine components.
• To compare the immunogenic potential of PLG microparticles versus nanoparticles.

Main Methods:

• PLG microparticles synthesized via solvent evaporation.
• PLG nanoparticles prepared using a solvent displacement method.
• Characterization of micro/nanoparticles with adsorbed antigens.

Main Results:

• PLG nanoparticles offer simpler synthesis and sterile filtration compared to microparticles.
• Both PLG microparticles and nanoparticles demonstrated comparable immunogenic responses in a mouse model.
• Detailed materials and methods for synthesis and characterization are provided.

Conclusions:

• PLG micro/nanoparticles are versatile platforms for vaccine antigen delivery and adjuvantation.
• The choice between micro- and nanoparticles may depend on specific formulation and manufacturing considerations.
• Further research into optimizing PLG-based vaccine systems is warranted.